name: "Build emu (Linux)"

on:
  workflow_call:
    # needed since it allows this to become a reusable workflow
  workflow_dispatch:
    # allows manual trigger

permissions:
  contents: "write"

env:
  PREMAKE_ACTION: "gmake2"
  DEPS_CACHE_KEY: "emu-deps-linux"
  DEPS_CACHE_DIR: "build/deps/linux"

  PACKAGE_BASE_DIR: "build/package/linux"
  THIRD_PARTY_BASE_DIR: "third-party"

jobs:
  deps:
    name: "Restore or build deps"
    if: ${{ !cancelled() }}
    uses: "./.github/workflows/emu-deps-linux.yml"

  builds-matrix-linux:
    name: "build"
    needs: ["deps"]
    runs-on: "ubuntu-20.04"
    if: ${{ !cancelled() }}
    continue-on-error: true

    strategy:
      fail-fast: false
      matrix:
        prj: [
            # regular api
            "api_regular",
            "steamclient_regular",
            # api + client (experimental)
            "api_experimental",
            "steamclient_experimental",
            # tools
            "tool_lobby_connect",
            "tool_generate_interfaces",
          ]
        arch: ["x64", "x32"]
        cfg: ["debug", "release"]

    steps:
      # clone branch
      - name: "Checkout branch"
        uses: actions/checkout@v4

      # deps
      - name: "Restore deps"
        id: "emu-deps-cache-step"
        uses: actions/cache@v4
        with:
          key: "${{ env.DEPS_CACHE_KEY }}-${{ env.PREMAKE_ACTION }}"
          path: "${{ env.DEPS_CACHE_DIR }}/${{ env.PREMAKE_ACTION }}"

      # extra helpers/tools, these are not built inside the deps build dir
      - name: "Clone third-party build helpers (common/linux)"
        uses: actions/checkout@v4
        with:
          ref: "third-party/common/linux"
          path: "${{env.THIRD_PARTY_BASE_DIR}}/common/linux"

      - name: "Clone third-party build helpers (build/linux)"
        uses: actions/checkout@v4
        with:
          ref: "third-party/build/linux"
          path: "${{env.THIRD_PARTY_BASE_DIR}}/build/linux"

      # fix folder permissions! not sure why this fails
      # nested subdirs "build/linux/release" cause permission problems
      - name: "Give all permissions to repo folder"
        shell: "bash"
        working-directory: "${{ github.workspace }}"
        run: sudo chmod -R 777 "${{ github.workspace }}"

      # generate project files
      - name: "Generate project files"
        shell: "bash"
        working-directory: "${{ github.workspace }}"
        run: |
          sudo chmod 777 ./${{env.THIRD_PARTY_BASE_DIR}}/common/linux/premake/premake5
          ./${{env.THIRD_PARTY_BASE_DIR}}/common/linux/premake/premake5 --file=premake5.lua --genproto --emubuild=${{ github.sha }} --os=linux gmake2

      # mandatory Linux packages
      - name: "Install required packages"
        shell: "bash"
        run: |
          sudo dpkg --add-architecture i386
          sudo apt update -y
          sudo apt install -y coreutils # echo, printf, etc...
          sudo apt install -y build-essential
          sudo apt install -y gcc-multilib # needed for 32-bit builds
          sudo apt install -y g++-multilib
          # sudo apt install -y clang
          sudo apt install -y libglx-dev # needed for overlay build (header files such as GL/glx.h)
          sudo apt install -y libgl-dev # needed for overlay build (header files such as GL/gl.h)
          sudo apt install -y libx11-dev:i386 # needed for overlay build
          # sudo apt install -y binutils # (optional) contains the tool 'readelf' mainly, and other usefull binary stuff

      # build target
      - name: "Build target"
        shell: "bash"
        working-directory: "${{ github.workspace }}/build/project/gmake2/linux"
        run: |
          echo "dry run..."
          make -n -j 2 config=${{ matrix.cfg }}_${{ matrix.arch }} ${{ matrix.prj }}
          echo "actual run..."
          make -j 2 config=${{ matrix.cfg }}_${{ matrix.arch }} ${{ matrix.prj }}

      # upload artifact/package to github Actions
      - name: "Upload target package"
        uses: actions/upload-artifact@v4
        with:
          name: "emu-linux-${{ matrix.prj }}-${{ matrix.cfg }}-${{ matrix.arch }}-${{ github.sha }}"
          path: "build/linux"
          if-no-files-found: "error"
          compression-level: 9
          retention-days: 1